Dynamo-electric machine.



E. B. WILLIAMSON.

DYNAMO ELECT'RIC MACHINE.

APPLICATION FILED MAY 7. 1917.

152.683. 'Patented Spt. .7, 1915.

UNITED STATES PATENT OFFICE,

ROBERT B. WILLIAMSO'N, OF MILWAUKEE, WISCONSIN, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO ALLIS-CHALMERS MANUFACTUR-ING COMPANY, A CORPORATION OF DELAWARE.

DYNAMO-ELECTRIC MACHINE.

Specification of Letters Patent.

Patented Sept. 7, 1915.

Application filed May 17, 1912. Serial No. 697,952.

N N, a citizen of the United States, residing' at Milwaukeegin the County of Milwaukee and State of \Viseonsin, have invented certain new and useful Improvements in Dvnano-Electric Machines, of which the following' is a full, clear, and exact specification.

This invention relates to d vnamo-electric machines, and particularlv to those dvnamoelectric machines wherein the stator core and its windings are removable from the machine frane as a unit.

In one class ot' split frame dynamo-electric machines, that tvpe wherein a part of the t'i-ame mav be removed and then the stator core with its windings removed as a unit` ,great care nust be taken that the various parts of the stator, including the stator core and windings, be held in their relative fixed positions and be so protected to prevent damaf'e to an v of said parts.

It .is. t11e-efore, tle object of my invention to prevent injury to the parts of a .removable unit including a core with its windings having end-turns, and to retai-n said parts in a fixed position relativelv to each other.

The inventionis illustrated on the accompanving sheet of drawings, in which- Figure 1 is an end elevation of a dvnamoelectric machine equipped with nv invention; and. Fiq. 2 is a front elevation parts being in section, of the same dvnamo-electric machine.

The various novel features of this invention will appear from the description and drawings. and will be particularlv set forth in the claims.

The various parts of dvnamo-electric machines have to be. so constructed and arrane'ed relativelv to each other that the parts will be properly supported and retained with respect to each other to prevent danage to anv of said parts.

My invention is particularly applicable to a dvnamo-electric machine such as the one here shown having a frame 10 which is split or divided into two portions, a removable upper portion 12, and a lower portion 11 provided with hearing members 13 in which a shutt 14 carrvinz the rotating core 15 with its windings 16 is mounted. surrounding the rotor is the stator including a core 17,

preferably laminated and provided with a,

This stator core s mounted and supported in an annuwinding having end turns 18.

lar menber or shell 19, which is adapted to be received b v the lower portion 11 ,of the split 'rame 10, and which is adapted to be covered by the upper portion 12 of said 'fi-ame. this annular member 19 being supported and held in positionby the frame when the machine is in assembled condition. The shell 19, which surrounds the stator core and its windings., is made sufliciently long, so that the end-turns 18 of the stator winding* are located completely within said' shell. The stator end-turns 18'are interposed between the shell 19 and retaining members `20, which are preferably annular retainin members in the form of insulated steel rings which exert pressure against the end-turns 18 of the stator Windings when said rings are 'forced into the position shown, to hold said end-turns in a fixed position. These retainin., rings 20 are bound to the end-turns bv anyproper-means such as cord or lacing 21. TVith this arrangement` the -stator end-turns are held in fixed positions. Proper insulationis provided between the shell 19 and end-turns 18, and also between the retaining rings 20 and endturns 18.

lVth this Construction, if it is desired to .remove the stator for any reason, the upper portion 12 of the split frame mav be re-.

moved first, then the rotor and stator removed as a unit, the rotor next being removed from within the stator. The stator will then appear as a mere barrel or annular shell having within it a core provided With a windinr. This shell mav be turned up on end or handled in anv other wav without iniurv to the various parts of the core and its windinL'. In view of the fact that the endturns 18 of the winding are completely within the annular shell, said end-turns cannot be iniured in an V manner whatsoever. The end-turns are held against said shell bv the retaining rinas 20 under all conditions whether during operation ornot.

There mav be various 'modifications and arranf'ements other than that here shown What I claim as new is: A

1. In a dynamo-electric machine, the combination 'ofa frame, a removable shell within said frame and supported thereby, a core mounted in said shell, and a Winding carried by said .core. and provided with' end turns extending beyond said core, said shell extending beyond 'said end-turns.

2. In a dynamo-electric machine, the combination of a frame, a shell within said frame and removable therefrom, a core mounted in said shell, a windng carried by said core and having end-turns projecting beyond said core, said shell extending beyond said end-turns, and means for holding said end-turns against said shell.

3. In a dynamo-electric machine having a split frame, an annular member mounted in said frame, a stator core supported in said annular member, a winding having end-turns and carried thereby, said annular member extending beyond said end-turns, and means for holding said end-turns in a fixed position.

4. In a dynamo-electric machine, the combination of a removable unit including a shell, a core mounted in said shell, Windings having end-turns and carried by said core, said shell extending beyond said endturns, and retaining members located radially inward from said end-turns and being adapted to hold said end-turns in a fixed position With respect to said shell.

5. In a dynamo-electric machine having a split frame, a removable unit located in said frame and including an annular member, a core mounted in said annular member,

a winding having end-turns and carried by said core, and retanng rngs for retanng saidaend-,turns in engagement with said anpendently of said frame.

7. In a dynamo-elect'ic machine, the combination of a field frame, an annular shell supported and held in position by said frame, a core supported by said shell, and a winding having projecting end-turns and carried by said core, said shell extending V in an axial direction beyond said projecting end turns.

8. In a dynamo-electric machine, the combination of a frame, an annular shell' su ported by and held in position within said frame, a core supported by said shell, and a Winding having projecting end-turns and carried by said core, portions of said shell extending in an axial direction beyond said r projecting end-turns.

In testmony whereof I aiiix my signature, in the presence of two witnesses.

ROBERT B. WILLIAMSON.

Witnesses:

CHAS. L. BYRON, Ron. E. SToLL.

copies of this patent may be obtained to: five cents each, by addressing the Commissioner of Patents, Washington, D. c." 

